\documentclass[tikz,border=2mm]{standalone}
\usepackage{array,amsmath,mathptmx,xcolor,bbding,pifont,colortbl,amssymb}
\usepackage[UTF8]{ctex}
\newcolumntype{C}[1]{>{\centering\let\newline\\\arraybackslash\hspace{0pt}}m{#1}}
% 只需要这个就可以
\usepackage[thicklines]{cancel}

% 可以设置线条颜色，默认是黑色
\usepackage{xcolor}
\renewcommand{\CancelColor}{\color{red}} 
\usepackage{tikz-cd}
\usepackage{tikz,graphicx,subfig,caption} % Required for drawing custom shapes
\usetikzlibrary{fit,matrix,chains,arrows,shapes,positioning,arrows.meta,chains,shadows,shapes.callouts,decorations.text,shapes.symbols,shapes.misc, positioning,decorations.pathreplacing,calc,backgrounds}
\arrayrulecolor{red}
% 设置浅蓝色
\definecolor{lightblue1}{RGB}{175, 175, 237}
\definecolor{lightgreen1}{RGB}{226, 246, 186}
\definecolor{lightpink}{RGB}{255, 202, 203}
\definecolor{lightblue2}{RGB}{205, 235, 255}
\definecolor{lightyellow1}{RGB}{254, 254, 203}
% 设定删除线颜色
\renewcommand{\CancelColor}{\color{blue}}

\begin{document}
	\begin{tikzpicture}[>=latex,every node/.style={inner sep=0.2em}]
		\node[align=left,rounded corners=0.5em] at (5em,0) (point1){
			\color{blue}\hspace{0.5em}($\#$0,a) $\Rightarrow$ ($\# 0a_2$,b) $\Rightarrow$ ($\# 0a_2b_9$,c) $\Rightarrow$ ($\# 0a_2b_9$\color{red}$c_{11},c$\color{blue}) \\
			
			\color{blue}$\Rightarrow$ \color{blue}($\#$\color{red}0$a_2b_9B_{10},c$\color{blue}) $\Rightarrow$ ($\#$\color{red}0$a_2B_3$,c\color{blue}) $\Rightarrow$ ($\#$\color{red}0$a_2B_3c_8,d$\color{blue})   \\
			
			\color{blue}$\Rightarrow$ ($\#$\color{red}0$a_2B_3A_4,d$\color{blue}) $\Rightarrow$ ($\#$\color{red}$a_2B_3A_4d_5,\#$\color{blue}) $\Rightarrow$ (\color{red}$\#0Z_1,\#$\color{blue}) $\Rightarrow$ \color{red}OK
		};
		
		\begin{pgfonlayer}{background}
			\node [draw=black,fill=lightyellow1 ,rounded corners=0.5em,rectangle, inner sep=0.2em,line width=0.0025em][fit=(point1)](box1){};
		\end{pgfonlayer}
		
		% 句柄
		\node(a1)[draw,fill=lightblue2, draw=blue, line width=0.05em, rectangle callout, callout relative pointer={(-1.9,0.9)}, rounded corners, align=center ,inner sep=0.3em] at ([xshift=2em, yshift=-1.5em]point1.east) {\color{blue}{句} \\ \color{blue}{柄}};
		
		% 虚线框
		\draw[color=red,dashed] (4.4,0.5) ellipse (0.3 and 0.2);
		\draw[color=red,dashed] (-0.7,0) ellipse (0.5 and 0.3);
		\draw[color=red,dashed] (4.4,0) ellipse (0.2 and 0.25);
		\draw[color=red,dashed] (1.7,-0.45) ellipse (0.7 and 0.3);
		\draw[color=red,dashed] (4.3,-0.45) ellipse (0.15 and 0.25);
		
		
	\end{tikzpicture}
\end{document}